Reilly said he overheard the man saying, "Do I have anything illegal? Am I good to go through now?"

TSA agents and police said they asked Brennan numerous times to put his clothes back on, but he refused, according to a spokesman.

"While some passengers covered their eyes and their children's eyes and moved away from the screening area, others stepped out of the screening lanes to look, laugh and take photos of Mr. Brennan," according to a Port of Portland police report.

TSA released a statement saying, "TSA partners with the traveling public to screen all passengers safely and efficiently. When a passenger chooses to be purposefully disruptive, we notify law enforcement. "